6403289 has 4 divisors (see below), whose sum is σ = 6409524. Its totient is φ = 6397056.

The previous prime is 6403279. The next prime is 6403297. The reversal of 6403289 is 9823046.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9823046 = 2 ⋅4911523.

It can be written as a sum of positive squares in 2 ways, for example, as 5175625 + 1227664 = 2275^2 + 1108^2 .

It is a cyclic number.

It is not a de Polignac number, because 6403289 - 2⁴ = 6403273 is a prime.

It is a super-2 number, since 2×6403289² = 82004220035042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6403219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1172 + ... + 3765.

It is an arithmetic number, because the mean of its divisors is an integer number (1602381).

Almost surely, 2^6403289 is an apocalyptic number.

It is an amenable number.

6403289 is a deficient number, since it is larger than the sum of its proper divisors (6235).

6403289 is a wasteful number, since it uses less digits than its factorization.

6403289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6234.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 6403289 is about 2530.4720903420. The cubic root of 6403289 is about 185.6953524514.

The spelling of 6403289 in words is "six million, four hundred three thousand, two hundred eighty-nine".